AddTempoChangeCommand.cpp

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: *//* Rosegarden A MIDI and audio sequencer and musical notation editor. This program is Copyright 2000-2008 Guillaume Laurent <glaurent@telegraph-road.org>, Chris Cannam <cannam@all-day-breakfast.com>, Richard Bown <richard.bown@ferventsoftware.com> The moral rights of Guillaume Laurent, Chris Cannam, and Richard Bown to claim authorship of this work have been asserted. Other copyrights also apply to some parts of this work. Please see the AUTHORS file and individual file headers for details. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information.*/#include "AddTempoChangeCommand.h"#include "base/Composition.h"#include <qstring.h>namespace Rosegarden
{
AddTempoChangeCommand::~AddTempoChangeCommand()
{
// nothing here either
}
void
AddTempoChangeCommand::execute()
{
int oldIndex = m_composition->getTempoChangeNumberAt(m_time);
if (oldIndex >= 0) {
std::pair<timeT, tempoT> data =
m_composition->getTempoChange(oldIndex);
if (data.first == m_time)
m_oldTempo = data.second;
}
m_tempoChangeIndex = m_composition->addTempoAtTime(m_time, m_tempo, m_target);
}
void
AddTempoChangeCommand::unexecute()
{
m_composition->removeTempoChange(m_tempoChangeIndex);
if (m_oldTempo != 0) {
m_composition->addTempoAtTime(m_time, m_oldTempo);
}
}
}